testRead: simplify error formatting
testRead: simplify error formatting

davewhat/tchannel,sasa233/tchannel,hustxiaoc/tchannel,sasa233/tchannel,savaki/tchannel,chenwenbin928/tchannel,bunnyblue/tchannel,savaki/tchannel,davewhat/tchannel,vanloswang/tchannel,benfleis/tchannel,RyanTech/tchannel,chenwenbin928/tchannel,benfleis/tchannel,vanloswang/tchannel,RyanTech/tchannel,hustxiaoc/tchannel,i/tchannel,i/tchannel,RyanTech/tchannel,bunnyblue/tchannel,chenwenbin928/tchannel,hustxiaoc/tchannel,Zirpon/tchannel,bunnyblue/tchannel,benfleis/tchannel,i/tchannel,savaki/tchannel,vanloswang/tchannel,Zirpon/tchannel,Zirpon/tchannel,sasa233/tchannel